Home
Class 11
CHEMISTRY
A light green coloured salt soluble in w...

A light green coloured salt soluble in water gives black percipitate on passing `H_(2)S` which dissolves readily in HCl. The metal ion present is :

A

`Co^(2+)`

B

`Zn^(2+)`

C

`Ni^(2+)`

D

`Mn^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
C
`Ni^(2+) + H_(2)S rarr underset(("Black ppt"))(NiS) overset(2HCl)rarr underset(("Soluble"))(NiCl_(2)) + H_(2)S`
Promotional Banner

Similar Questions

Explore conceptually related problems

A mixture consists (A) (red solid) and (B) (colourless solid) which gives lilac colour in flame. (a)Mixture gives black precipitate ( C) on passing H_(2)S (g) . (b) ( C) is soluble in aquaregia and on evaporation of aquaregia and adding SnCl_(2) gives greyish black precipitate (D) . The salt solution with NH_(4)OH gives a brown precipitate. The sodium extract gives yellow precipitate with AgNO_(3) solution which is insoluble in dilute ammonia solution. Identify (A) and (B) , and the precipitates (C ) and (D) .

White substance dissolves in hot water. A black precipitate appears on passing H_(2)S gas in its aqueous solution. The black precipitate dissolves in hot HNO_(3) . A white precipitate is obtained on adding concentrated H_(2)SO_(4) in its solution. This white precipitate is of

An aqueous solution of a substance gives a white percipitate on treatment with dil ,HCI which dissolves on heating .When H_(2)S is passed through the hot acidic solution a black precipitate is obtained .The substances are not :

The pair (s) where both the ions are precipitated upon passing H_(2)S gas in the presence of dilute HCl is (are) :

When a KI solution is added to a metal nitrate, a black precipitate is produced which dissolves in an excess of KI to give an organge solution. The metal ion is:

The metallic salt (XY) is soluble in water. (a) When the aqueous soluble of (XY) is treated with NaOH solution, a white precipitate (A) is formed. In excess of NaOH solution, a white precipitate (A) is formed. In excess of NaOH solution, white precipitate (A) dissolves to form a compound (B) . When this solution is boiled with soild NH_(4) Cl , a precipitate of compound (C) is formed. (b) An aqueous solution on treatment with BaCl_(2) solution gives a white precipitate (D) white is insoluble in conc HCl . ( c) The metallic salt (XY) forms a double salt (E) with potassium sulphate. Identify (XY),(A),(B),(C),(D) and (E) .

An aqueous solution of a substance gives a white percipitate on treatment with dil HCl , which dissole on heating. On passing H_(2)S in hot acidic solution a black percipitate is formed. The substance is:

Which of the following salt will not produce black ppt on passing H_2S through their aqueous salt solutions in desired medium?

A white crystalline substance dissolves in hot water. On passing H_(2)S in this solution, black precipitate is obtained. The black precipitate dissolves completely in hot HNO_(3) . On adding a few drops of conc. H_(2)SO_(4) , a white precipitate is obtained. this substance is :

An aqueous solution of colourless metal sulphate M , gives a white precipitate with NH_(4)OH .This was soluble in excess of NH_(4)OH . On passing H_(2)S through this solution a white precipitate is formed.The metal M in the salt is: